feat: add 7 new features — exec shell, SSE events, compose import, docker resources, resource limits, email notifications, auto-updates

- Container exec/shell via WebSocket + xterm.js (subtle >_ button on cards)
- Live dashboard updates via SSE (resource alerts, health changes, update notices)
- Docker Compose import with YAML parsing, preview, and dependency-ordered deploy
- Volume & network management modal with disk usage overview
- CPU/memory resource limits on deploy and live update
- Email SMTP notifications (nodemailer) alongside Discord/Telegram/ntfy
- Scheduled auto-update scheduler with maintenance windows (daily/weekly/monthly)

New deps: ws, js-yaml, nodemailer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

status/build.js

@@ -22,6 +22,7 @@ const bundles = {
     JS('core', 'service-infrastructure.js'),
     JS('core', 'service-crud.js'),
     JS('core', 'service-create.js'),
+    JS('live-events.js'),
   ],
   'features.js': [
     JS('logo-customization.js'),
@@ -37,6 +38,9 @@ const bundles = {
     JS('resource-monitor.js'),
     JS('health-check.js'),
     JS('update-management.js'),
+    JS('docker-resources.js'),
+    JS('compose-import.js'),
+    JS('container-exec.js'),
     JS('audit-log.js'),
     JS('weather.js'),
     JS('clock.js'),